ZFS on Linux spa_sync()

gistfile1.txt

# /apps/perf-tools/bin/funcslower -t spa_sync 100000
Tracing "spa_sync" slower than 100000 us... Ctrl-C to end.
4445151.315130 |     0) ! 151766.8 us |  } /* spa_sync [zfs] */
4445166.267272 |     8) ! 104154.9 us |  } /* spa_sync [zfs] */
4445191.382823 |     7) ! 216032.0 us |  } /* spa_sync [zfs] */
4445196.291821 |     7) ! 125089.3 us |  } /* spa_sync [zfs] */
4445201.371173 |     7) ! 204526.1 us |  } /* spa_sync [zfs] */
^C
Ending tracing...